《科学》[Science]13年6月14日出版pdf全文

nero1981

# \* G: X/ Z+ @8 \& l9 y" _4 SCOVER Polished thin section (70 micrometers) of volcanic glass, sample
( g! z/ k/ J) M& _) y2 L6 \! wcatalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten $ g( P* N. B+ v, I; z
lava erupted onto the sea floor freezes to glass and minerals that contain clues 9 ~/ y, K: g: [0 S& i, C% y
to the lava's ancient past and origin in Earth's deep interior. Volcanic glasses
. Q- l0 Y. J6 m* Q! [8 \6 vsuch as this one may reveal a link between Earth's oxidation state and the deep % G( m- D5 U/ s5 M$ [) W- N0 J
carbon cycle. See page 1314. $ z7 e9 B- S$ K; E
Image: G. Macpherson, T. Gooding, and E. Cottrell
. I8 j& C, i9 [+ i! m1 S/ ?# I

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